Abstract
Water pump is a widely used machine, which is applied to vehicles, vessels, aircraft and other equipment. Once pump develops faults, critical accidents may occur. So the fault diagnosis research and fault diagnosis system design of pump has great realistic significance. Aiming at the centrifugal pump in common use, the study discusses the diagnosis requirement based on testability-orient failure mode and effect analysis (T-FMEA). Then design of the hardware of fault diagnosis system is presented. The software framework is also given in the paper. BP-nerve network is selected to diagnose the failures of pump. The validity and valid of the system is verified through experiment. It reveals that T-FMEA has a certain practical significance for the water pump fault diagnosis research, which can guide the design of fault diagnosis system.
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